Vehicle-choke-brake.



No. 781,782. PATENTED FEB. 7, 1905. R. MOGREW & W. J. ROBERTS.

No. 781,782. PATENTED FEB. 7, 1905. R. MOGREW & W. J. ROBERTS.

VEHICLE OHOGK BRAKE.

APPLIOATION FILED mans,- 1904.

2 SHEETS-SHEET 2.

anucul'ou G wm m No. 781,782. Patented February 7, 1905.

UNITED STATES PATENT EEicE.

ROSS MCGRElV AND VILLIAM J. ROBERTS, F BUlTIC, MONTANA, AS- SIGNORS OF ONE-THIRD TO H. E. HEATH. OF BUITTIE, MONTANA.

VEHICLE SHOCK-BRAKE.

SPECIFICATION forming part of Letters Patent No. 781,782, dated February 7, 1905.

Application filed March 25, 1904. Serial No. 199.942.

if U Referring to the drawings, A indicates the Be it known that we, Ross Mcbruuw and body of the wagon, A the rear axle, and A \Vnaaan J. Ronmrrs, citizens of the United the front axle. Upwardly and forwardly ex- States, residing at Butte, in the county of Siltending brackets B are securely fastened to verbow andState of Montana, have invented a the rear axle A, the upper ends of said new and useful Vehicle Chock-Brake, of which bracket being slotted vertically, as shown at the following is a specification. B, and mounted in the said slotted brackets This invention is a new and useful construcis a horizontal shaft (A, having arms I) rigidly tion of brake or chock, particularly adapted fastened to the opposite ends thereof, said to for use upon farm-wagons. arms carrying the brake-blocks E, which are 60 Asa rule the rear wheels of heavy draftadapted to fit beneath the rear wheels when wagons have been checked by means of a the arms I) are lowered.as most clearlyshown chain connected to the spoke and rim of the in Figs. 1 and 3, said blocks serving as a wheel, and attached to the front axle. This wedge or chock and prevent the rear wheel chock has usually been applied to only one turning. The rear portion thus slides upon wheel and consequently there has been a tendthe brake-blocks, and the progress is matericncy to make the wagon slide to one side ally impeded. The rearward movement of while moving down a grade. Furthermore, the brake-blocks I is limited by the chains it is very inconvenient for the driver to be F, which are connected to said blocks and also obliged to get down from the seat and fasten to a ring F, connected to the front axle A" 7 the chain to the wheel each and every time a The ln-ake-blocks E are provided with side grade is reached. Furthermore, chocking flanges E, between which the rear wheel fits, the wheel by means of a chain strains the and the bottom of each block is formed with wagon unduly when sliding down a steep a tapered dovetailed groove E", in which grade, audit is with the idea of avoiding these fits the tapered dovetailed rib E, formed 75 objections that the present form of chockupon the top or inner face of the detachable brake has been invented. brake-shoe IE, it being desirable to have a do- Our invention is also applicable to motortachable shoe, so that when the shoe becomes vehicles for the purpose of affording a quick worn it can be removed and another one at- 0 stop and at the same time avoid any strain tached in its place, and. furthermore, a numupon the said motor-vehicle. berof ditl'erentsets of shoesmay be employed,

\Vith these objects in view our invention each pair of shoes being roughened according consists in the novel features of construction, to the character of the work required therecmnbiiiation, and arrangenient, all of which of, as at times an exceelingly rough shoe willbe fullydescribed hereinafter and pointed may be desired and at other times a com- 5 out in the claims. paratively smooth one. The chains F pass In the drawings forming a part in this through eyes or loops (it, formed upon the specification. Figure 1 is a side elevation of a lower ends of the depending rods ti", secured vehicle provided with our improved constructo the bottom of the wagon-body A.

tion of brake, said brake being shown applied For the purpose of raising and lowering the 9 in full lines and released in dotted lines. Fig. arms D, which carry the brake-blocks E, we 2 is a bottom plan view of the same. Fig. 3 attach a lever-arm H to the shaft U. Adjais an end view. Fig. A is a detail side view cent one end and pivotally connected to the of the brake block and shoe, and Fig. 5 is a 1 other end of this arm is the rod 1, which contop plan view of the brake-shoe. Fig. 6 is a nects to the hand-lever K, pivoted at K to 9 top plan view of the brake-block. Fig. 7 is a the side of the wagon-body, and by throwing sectional view on the line 7 T of Fig. 4. Figs. said hand -lever forwardly the brake-blocks S and 9 show detail views of the brake-block 1 are raised, as shown in dotted lines in Fig. l, employed in connection withamotor-vehicle. and are held in such position by locking the 5 Fig. 10 shows a detail of construction. 1 lever in engagement with the notched bar K Vhen it is desired to apply the brakes, the lever is thrown back and the blocks dropped to the position shown in Figs. 1 and 3, the chains F preventing the said brake blocks passing too far beneath the wheels. The brackets B being slotted, as shown at B, permit a limited vertical movement of the shaft C, thereby relieving the said brackets of undue strain which would he placed thereon if the shaft were held against vertical movement.

In Figs. 8 and 9 we have shown a brakeblock particularly adapted for use in connection with motor-vehicles, said block having rollers L, journaled between the side flanges of the block, said rollers taking up the motion of the rear wheels of the motor-vehicle when forced under said wheels, as it would injure the machinery to stop it suddenly. Each roller L has a ratchet-wheel L mounted upon one end thereof and which is engaged by apawl L thereby preventing the rollers turning except in the proper direction.

It will thus be seen that we provide a brake of the kind described capable of carrying out all the objects hereinbefore mentioned.

Having thus fully described our invention, what we claim as new, and desire to secure by Letters Patent, is

1. The combination with the axle-brackets slotted vertically, of ahorizontal shaft mounted therein, arms rigidly connected to the ends of the shaft, the brake-blocks attached to the outer ends of the arms, the chains connected to said brake-blocks for the purpose of limiting their rearward movement, the lever-arm attached to the shaft, a hand-lever and a rod connecting said hand-lever and lever-arm.

2. The combination with the axle-brackets slotted vertically, of the horizontal shaft mounted in said brackets, the arms attached to said shaft, the brake-blocks connected to the arms, and having tapered dovetailed grooves, the detachable brake-shoes having tapered dovetailed ribs, the lever-arm attached to the shaft, the hand-lever and the rod conmeeting the hand lever and lever arm, to-

gether with the chains and guides for said chains, as set forth.

3. A brake-block having side flanges, the rollers journaled in said side flanges, each roller having a ratchet-Wheel at one end, and a pawl, pivoted to the outer side of the flange and adapted to engage the ratchet for the purpose set forth.

ROSS MCGREW. WM. J. ROBERTS.

Witnesses:

J. l). OBRLEN, J. D. WVILsoN. 

